警告说数组赋值中指针和整数之间的比较

Question

char playingfield[4][8] = {
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
void dropbomb(void)
{
    int row = 3 , column = 0;
    for(row;row>=0;row--)
    {
        for(column; column<=8;column++)
        {
            if(playingfield[row][column] == "#")
            {
                playingfield[row][column] = "$";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
            }
            else if(playingfield[row][column] =="$")
            {
                playingfield[row][column] = " ";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
                if(row<3)
                {if(playingfield[row+1][column]=="$")
                    playingfield[row+1][column]="*";
                else if(playingfield[row+1][column]=="&")
                    playingfield[row+1][column]=".";
                else if (playingfield[row+1][column]=="'")
                    playingfield[row+1][column]=",";
                }
            }
            else if(playingfield[row][column]==",")
                stage = "finished";
            else if(playingfield[row][column]=="%")
            {
                playingfield[row][column] = "&";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
            }
            else if (playingfield[row][column]=="&")
            {
                playingfield[row][column] = " ";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
                if(row<3)
                {if(playingfield[row+1][column]=="$")
                    playingfield[row+1][column]="+";
                else if(playingfield[row+1][column]=="&")
                    playingfield[row+1][column]="/";
                else if (playingfield[row+1][column]=="'")
                    playingfield[row+1][column]="-";
                }
            }
            else if (playingfield [row][column]=="*")
            {
                playingfield[row][column] = "$";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
                if(row<3)
                {if(playingfield[row+1][column]=="$")
                    playingfield[row+1][column]="*";
                else if(playingfield[row+1][column]=="&")
                    playingfield[row+1][column]=".";
                else if (playingfield[row+1][column]=="'")
                    playingfield[row+1][column]=",";
                }
            }
            else if (playingfield[row][column]=="+")
            {
                playingfield[row][column] = "&";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
                if(row<3)
                {if(playingfield[row+1][column]=="$")
                    playingfield[row+1][column]="*";
                else if(playingfield[row+1][column]=="&")
                    playingfield[row+1][column]=".";
                else if (playingfield[row+1][column]=="'")
                    playingfield[row+1][column]=",";
                }
            }
            else if(playingfield[row][column] == "-")
            {
                score=score+1;
                playingfield[row][column] == "'";
            }
            else if (playingfield[row][column] == ".")
            {
                playingfield[row][column] = "$";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
                if(row<3)
                {
                if(playingfield[row+1][column]=="$")
                    playingfield[row+1][column]="+";
                else if(playingfield[row+1][column]=="&")
                    playingfield[row+1][column]="/";
                else if (playingfield[row+1][column]=="'")
                    playingfield[row+1][column]="-";
                }
            }
            else if (playingfield[row][column] == "/")
            {
                playingfield[row][column] = "&";
                OledSetCursor(column,row);
                OledPutChar(playingfield[row][column]);
                if(row<3)
                {
                if(playingfield[row+1][column]=="$")
                    playingfield[row+1][column]="+";
                else if(playingfield[row+1][column]=="&")
                    playingfield[row+1][column]="/";
                else if (playingfield[row+1][column]=="'")
                    playingfield[row+1][column]="-";
                }
            }
        }
    }

我试图一个一个地遍历这个数组中的单元格。但是，对于涉及“playingfield [row] [column]”的任何地方，它告诉我指针和整数之间的比较。还有一个警告说，Assignment Makes Integer from pointer without a cast.

Answer 1

字符串字面量，如"#" 实际上是指向数组中第一个字符的指针。你在做什么，例如

playingfield[row][column] == "#")

将char 与char * 进行比较。

我认为您的意思是使用字符文字：

playingfield[row][column] == '#')

注意从双引号 " 到单引号 ' 的变化。

---

当你编译它时，你会遇到一个更严重的错误：查看column 循环条件，它包含索引8，它超出了数组的范围（它是数组中的第九个索引）。

Answer 2

将双引号中的字符串文字（如 "$"）更改为单引号中的字符文字 '$'。